What should be paid attention to in the installation of the suction pipeline of the self-priming pump
The self-priming pump adopts the self-priming pump body structure with radial liquid return. The self-priming pump body is composed of a suction chamber, a liquid storage chamber, a scroll chamber, a liquid return hole, a vapor-liquid separation chamber, etc. After the self-priming pump starts normally, the impeller will suck the liquid stored in the chamber and the gas in the suction pipeline. Inhaled at the same time, and fully mixed in the impeller, under the effect of centripetal force, the liquid is brought into the vapor to the outer edge of the scroll, and a certain thickness of milky white foam belt and high-speed running liquid ring are produced on the edge of the impeller.
The vapor-liquid combination enters the vapor-liquid separation chamber according to the outer diffusion pipe, and then the whole process is cyclically opened, and the gas in the suction pipeline continues to decrease until the gas is exhausted, and the whole process of self-priming is carried out. The suction pump is invested in all normal operations, and there is a refrigeration chamber at the bottom of the rolling bearing body of some self-priming pumps.
Self-priming pump motor heating causes and solutions Summary Self-priming pump motor heating is not always a problem of motor product quality, talk about what causes motor heating and how to deal with it:
1. The mechanical seal of the self-priming pump is too tight during installation and removal. Solution: Re-scheduling the amount of bullet yellow reduction.
2. The quality of the assembly line of the self-priming pump is poor, and the balance between the motor and the pump shaft of the self-priming pump is not uniform. Solution: Check the quality of the assembly line of the self-priming pump, and the reassembly is effective.
4. The transported material share is very large. Solution: Add the motor output power to deal with the heating of the self-priming pump motor.
3. The working voltage on the spot is not stable or the applicable cable of the self-priming pump motor does not exceed the standard. Solution: To deal with the problem of working voltage, replace the standard cable.
The installation of the suction line of the self-priming pump should pay attention to:
A. The installation height-width ratio of the suction inlet should not exceed 5 meters. When the standard is approved, the installation height-width ratio of the suction inlet should be as small as possible smaller than the water storage plan of the storage tank, and the length of the suction pipe should be reduced as much as possible. Install the elbow, which is beneficial to reduce the self-priming time and improve the self-priming effect.
B. The gate valve, flange plate, etc. in the suction pipeline should be resolutely prevented from leaking steam or water leakage, that is, no steam leakage is allowed in the suction pipeline.
C. The self-priming pump body should be prevented from inhaling solid and other dirt, so the suction pipeline should be set with filtering equipment. The reasonable total blanching area of the filter equipment should be 2-3 times the cross section of the suction pipe, and the filter equipment should be protected regularly.
D. The suction pipeline and the discharge pipeline need to have their own support frame, and the self-priming pump body itself cannot bear the load of the pipeline.